If it's not what You are looking for type in the equation solver your own equation and let us solve it.
x in (-oo:+oo)
((2*x)/3)*(12*x+18) = o // - o
((2*x)/3)*(12*x+18)-o = 0
2/3*x*(12*x+18)-o = 0
2/3*x*(12*x+18)-o = 0
8*x^2-o+12*x = 0
8*x^2-o+12*x = 0
8*x^2-o+12*x = 0
DELTA = 12^2-(4*8*(-o))
DELTA = 32*o+144
32*o+144 = 0
32*o+144 = 0 // - 144
32*o = -144 // : 32
o = -144/32
o = -9/2
DELTA = 0 <=> t_3 = -9/2
x = -12/(2*8) i o = -9/2
x = -3/4 i o = -9/2
( x = ((32*o+144)^(1/2)-12)/(2*8) or x = (-(32*o+144)^(1/2)-12)/(2*8) ) i o > -9/2
( x = ((32*o+144)^(1/2)-12)/16 or x = (-((32*o+144)^(1/2)+12))/16 ) i o > -9/2
o+9/2 > 0
o+9/2 > 0 // - 9/2
o > -9/2
x in { -3/4, ((32*o+144)^(1/2)-12)/16, (-((32*o+144)^(1/2)+12))/16 }
| 12x+8(200-x)=2240 | | 7y+4-2y+1=2y-7 | | 3x/4-3=9 | | 6x=-112 | | 160+20=180 | | 2s^2-13s=7 | | y+(y+1)+(y+2)=450 | | 6a-20=46 | | (x+9)(5-x)=0 | | x+(x+11)+(x+15)=277 | | 4(x+3)-2x=2(x+1)+10 | | x(x-6)+7=x(x+1) | | 10=m-7 | | (11)(3)x=11x | | 13n=65 | | 65+55+2x+30=180 | | 3(x+2)-2x+3=x+6 | | 3-(2+1)=3(6-6) | | -6x+12=4-8x | | 5.7(3+5x)-5.1=12 | | -4.6=4m-3.4 | | 5(3x+2)=14x+4 | | 8x+6=12-3 | | 7x-7+2=-23 | | 3x-5y=20fory | | 12x-5x+145=12x+90 | | 22=-3x(14-20) | | (3x^2y^3)(-2x^4y)= | | 23=d*3-4 | | 2y-2y= | | 6x+12=4-8x | | 5.2z-5.11=17.094 |